Liquid-ejecting head and method of manufacturing the liquid-ejecting head

Abstract

Provided is a liquid-ejecting head, including a member having opened therein an ejection orifice configured to eject a liquid, in which the liquid-ejecting head has, on a side being positioned on the member and having opened therein the ejection orifice, a cured layer of a mixture containing: (a) a condensate of hydrolyzable silane compounds containing a hydrolyzable silane compound having 20 or more fluorine atoms and a hydrolyzable silane compound having a cationically polymerizable group; (b) a fluorine atom-containing nonionic surfactant; and (c) an epoxy resin.

What is claimed is: 
     
       1. A liquid-ejecting head, comprising a member having opened therein an ejection orifice configured to eject a liquid, wherein the liquid-ejecting head has, on a side being positioned on the member and having opened therein the ejection orifice, a cured layer of a mixture containing:
 a condensate of hydrolyzable silane compounds containing a hydrolyzable silane compound having 20 or more fluorine atoms and a hydrolyzable silane compound having a cationically polymerizable group; 
 a fluorine atom-containing nonionic surfactant; and 
 an epoxy resin, 
 wherein the fluorine atom-containing nonionic surfactant includes a polyoxyethylene alkyl ether, a polyoxyethylene aryl ether, or a polyoxyethylene dialkyl ester substituted by fluorine atoms. 
 
     
     
       2. The liquid-ejecting head according to  claim 1 , wherein the fluorine atom-containing nonionic surfactant has a fluorine atom-containing group, and the fluorine atom-containing group has 9 or more fluorine atoms. 
     
     
       3. The liquid-ejecting head according to  claim 1 , wherein the epoxy resin has a hydroxyl group. 
     
     
       4. The liquid-ejecting head according to  claim 1 , wherein the hydrolyzable silane compound having 20 or more fluorine atoms comprises at least one compound selected from the group consisting of compounds represented by formulae (1), (2), (3), and (4):
   F-Rp-A-SiX a Y 3-a   formula (1)
 
 wherein, in the formula (1), Rp represents a perfluoropolyether group, A represents an organic group having 1 to 12 carbon atoms, X represents a hydrolyzable substituent, Y represents a nonhydrolyzable substituent, and a represents an integer of 1 to 3;
   R 3-a X a Si-A-Rp-A-SiX a Y 3-a   formula (2)
 
 
 wherein, in the formula (2), R represents a nonhydrolyzable substituent, Rp represents a perfluoropolyether group, A represents an organic group having 1 to 12 carbon atoms, X represents a hydrolyzable substituent, Y represents a nonhydrolyzable substituent, and a represents an integer of 1 to 3; 
 
       
         
           
           
               
               
           
         
         wherein, in the formula (3), A represents an organic group having 1 to 12 carbon atoms, Z represents a hydrogen atom or an alkyl group, Q 1  represents a divalent bonding group, m represents an integer of 1 to 4, Rp represents a perfluoropolyether group, X represents a hydrolyzable substituent, Y represents a nonhydrolyzable substituent, and a represents an integer of 1 to 3;
   F-Rp-Q 2   A-SiX a Y 3-a ) n   formula (4)
 
 
         wherein, in the formula (4), Rp represents a perfluoropolyether group, A represents an organic group having 1 to 12 carbon atoms, X represents a hydrolyzable substituent, Y represents a nonhydrolyzable substituent, a represents an integer of 1 to 3, and n represents 1 or 2, where when n=1, Q 2  represents a divalent bonding group, and when n=2, Q 2  represents a trivalent bonding group. 
       
     
     
       5. The liquid-ejecting head according to  claim 4 , wherein Rp in each of the formulae (1), (2), (3), and (4) is represented by formula (5): 
       
         
           
           
               
               
           
         
         wherein, in the formula (5), o, p, q, and r each represent an integer of 0 or 1 or more, and at least one of o, p, q, or r represents an integer of 1 or more. 
       
     
     
       6. The liquid-ejecting head according to  claim 5 , wherein at least one of o, p, q, or r in the formula (5) represents an integer of 1 to 10. 
     
     
       7. The liquid-ejecting head according to  claim 1 , wherein the condensate comprises a condensate obtained by heating the hydrolyzable silane compounds in a mixed liquid of a non-fluorine-based organic solvent and a fluorine-based solvent. 
     
     
       8. The liquid-ejecting head according to  claim 7 , wherein the mixed liquid of the non-fluorine-based organic solvent and the fluorine-based solvent comprises a mixed liquid of an alcohol free of a fluorine atom and a hydrofluoroether. 
     
     
       9. The liquid-ejecting head according to  claim 1 , wherein the hydrolyzable silane compound having the cationically polymerizable group comprises a compound represented by formula (6):
   Rc-SiR b X 3-b   formula (6)
 
 wherein, in the formula (6), Rc represents a nonhydrolyzable substituent having an epoxy group, an oxetane group, or a cationically polymerizable vinyl group, R represents a nonhydrolyzable substituent, X represents a hydrolyzable substituent, and b represents an integer of 0 to 2. 
 
     
     
       10. The liquid-ejecting head according to  claim 1 , wherein the condensate comprises a condensate of the hydrolyzable silane compounds containing the hydrolyzable silane compound having 20 or more fluorine atoms, the hydrolyzable silane compound having the cationically polymerizable group, and a hydrolyzable silane compound represented by formula (7):
   (Rd) a -SiX 4-a   formula (7)
 
 wherein, in the formula (7), Rd represents a substituted or unsubstituted alkyl group having 1 to 13 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 13 carbon atoms, X represents a hydrolyzable substituent, and a represents an integer of 1 to 3. 
 
     
     
       11. The liquid-ejecting head according to  claim 1 , wherein the member comprises a cured product of the epoxy resin. 
     
     
       12. The liquid-ejecting head according to  claim 1 , wherein a content of the fluorine atom-containing nonionic surfactant in the mixture is from 0.01 mass % to 20 mass %. 
     
     
       13. The liquid-ejecting head according to  claim 1 , wherein a content of the fluorine atom-containing nonionic surfactant in the mixture is from 0.1 mass % to 15 mass %. 
     
     
       14. The liquid-ejecting head according to  claim 1 , wherein a content of the epoxy resin in the mixture is from 5 mass % to 90 mass %. 
     
     
       15. The liquid-ejecting head according to  claim 1 , wherein the member comprises a cured product of an epoxy resin different from the epoxy resin in the cured layer.